Question

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Answer 1

Answer: h=9 inches

Explanation:

`7.\\a.\\\displaystyle\\A=(1)/(2)bh \\`

Multiply both parts of the equation by 2:

`2A=bh`

Divide both parts of the equation by b (b≠0):

`\displaystyle\\(2A)/(b) =h\\\\Thus,\\\\ h=(2A)/(b)`

`\displaystyle\\b.\\\\A=54\ in.^2\ \ \ \ b=12\ in.\\\\h=(2*54)/(12) \\\\h=(2*54)/(2*6) \\\\h=(54)/(6) \\\\h=9 \ in.`